Question

please give answer of this question on paper

Answer 1

DIAMETER OF WHEEL = 80 cm  ; therefore radius = 40cm

speed of car = 66 km/hr = 66 * 1000 /3600 m/s = 66*1000*100/3600 cm/s

therefore distance covered by wheel in 1 sec = 66*1000*100/3600 cm

therefore distance covered by wheel in 10minutes (10 * 60) = 66*1000*100*10*60/3600 = 11* 10 5 cm

 distance covered in one revolution =circumference of wheel = 2 * 22/7 * 40 cm 

therefore no of revolution in 1 cm = 7/2*22*40

therefore no of revolution in 10 min =therefore no of revolution in 11 * 10 5cm = 7/2*22*40 * 11 *10 5 = 4375

Answer 2

this is the method to solve it